{"id":19037049,"date":"2026-10-05T17:54:39","date_gmt":"2026-10-05T17:54:39","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/error-in-wordpress-7\/"},"modified":"2026-10-05T17:54:39","modified_gmt":"2026-10-05T17:54:39","slug":"error-in-wordpress-7","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/error-in-wordpress-7\/","title":{"rendered":"Error in WordPress"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Site was working, now getting an error page, below are the errors<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function &#8220;_wp_register_default_icon_collections&#8221; not found or invalid function name in C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\class-wp-hook.php:353 Stack trace: #0 C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\class-wp-hook.php(377): WP_Hook-&gt;apply_filters() #1 C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\plugin.php(522): WP_Hook-&gt;do_action() #2 C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-settings.php(771): do_action() #3 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\WP_CLI\\Runner.php(1394): require(&#8216;\u2026&#8217;) #4 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\WP_CLI\\Runner.php(1313): WP_CLI\\Runner-&gt;load_wordpress() #5 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\WP_CLI\\Bootstrap\\LaunchRunner.php(28): WP_CLI\\Runner-&gt;start() #6 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\bootstrap.php(84): WP_CLI\\Bootstrap\\LaunchRunner-&gt;process() #7 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\wp-cli.php(35): WP_CLI\\bootstrap() #8 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\vendor\\wp-cli\\wp-cli\\php\\boot-fs.php(17): require_once(&#8216;\u2026&#8217;) #9 C:\\Program Files (x86)\\Plesk\\Additional\\modules\\wp-toolkit\\wp-cli\\wpt-wp-cli.php(49): require_once(&#8216;\u2026&#8217;) #10 {main} thrown in C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\class-wp-hook.php on line 353 Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function &#8220;_wp_register_default_icon_collections&#8221; not found or invalid function name in C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\class-wp-hook.php:353 Stack trace: #0 C:\\inetpub\\vhosts\\rnwritenow.com\\httpdocs\\wp-includes\\class-wp-hook.php(377<\/p>\n","protected":false},"template":"","class_list":["post-19037049","topic","type-topic","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19037049","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19037049\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19037049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}